Lens for Canon C100

Tomorrow I will buy a Canon C100!
I'm so happy and excited about to use it but I still don't know which lens to buy.
I would love a lens to use overall handeld, to use in every situation, just to start with the camera.
I can buy a Canon 24-70L 2.8 I but I'm a little afraid cause it's not IS and I don't know if I can handle it without shoulder mount...

I have not used the Tameron, could be good, but most lenses are not "sharp" till you stop down a bit. With the C100 an f4.0 lens is not really a big deal for most work. If you are shooing in the dark, use fast primes.